<link href="css/castyles.css" rel="stylesheet" type="text/css" />
<div class="tab">
                          <ul>
                            <li> <a href="offsetprinting.php">Offset Printing</a></li>
                            <li> <a href="digitalprinting.php">Digital Printing</a></li>
                            <li> <a href="designing.php">Designing</a></li>
                          </ul>
                      </div>